My two observations:
When using the Pattern (both Circular and Linear) tool, you can not edit the pattern once you click Done.
When using the Pattern tool you can not use the Pattern Histoy data fields to edit the pattern, you can only edit the new Pattern with the click and drag arrows and their attached small data fields.
When I opened the Beta and started to test the History features I found myself chuckling out loud multiple times. The history based features are such a great quality-of-life addition.
Great work so far team!